TM 55.1510-220-10 *3. Flight controls Unlock and check. *4. Parking brake Set. CAUTION The  elevator  trim  system  must  not be  forced  past  the  limits  which  are indicated  on  the  elevator  trim  tab position indicator. 5. Elevator trim Set to "O" (neutral). CAUTION Do  not  cycle  landing  gear  handle on the ground. *6. Gear - DN. *7. Ice vane pull handles In. *8. Keylock switch - ON. *9. Battery switch - ON. 10. Ice vane switches - RETRACT. 11. Lighting  systems  Check  as  required,  to  include navigation   lights,   recognition   lights,   landing/taxi light,  wing  ice  lights,  beacons,  emergency  lights, and interior lights, then OFF. NOTE The emergency lights override switch    should    be    placed    in    the TEST  position  and  the  emergency lights  (5)  checked  for  illumination and intensity.  A dim light indicates a    weak    battery    pack.        At    the completion of the check, the switch must    be    cycled    from    the    TEST position to the OFF/RESET position and then placed in AUTO. 12. Pitot  tubes  (2),  stall  warning  vane,  heated  fuel vents (2) Check. a. Stall warning heat switch ON. b. Pitot  heat  switches  (2)  ON.    Check  cover removed. c. Fuel vent heat switches (2) ON. d. Left wing heated fuel vent Check by feel for heat and condition. e. Stall  warning  vane  Check  by  feel  for  heat and condition. f. Left  pitot  tube  Check  by  feel  for  heat  and free of obstructions. g. Right pitot tube Check by feel for heat and free of obstructions. h. Right  wing  heated  fuel  vent  Check  by  feel for heat and condition. i. Stall warning heat switch OFF. j. Pitot heat switches (2) OFF. k. Heated fuel vent switches (2) OFF. 13. Fuel     gages     Check     fuel     quantity     and     gage operation. 14. Battery switch As required. 15. Toilet   Check   condition   and   that   knife   valve   is open approximately 0.25 inch. 16. Emergency   equipment   Check   that   all   required emergency  equipment  is  available  and  that  fire extinguishers (2) and first-aid kits (4) have current inspection dates. 17. Mission   equipment   and   circuit   breakers   Check and set. 18. Parachutes Check secure and for current inspection and repack dates. 8-13.  FUEL SAMPLE. NOTE Fuel and oil quantity check may be performed prior to EXTERIOR CHECK to preclude carrying ladder and  fuel  sample  container  around during    the    inspection.        During warm weather open fuel cap slowly to   prevent   being   sprayed   by   fuel under    pressure    due    to    thermal expansion. *1. Fuel sample Check collective fuel sample from all drains   for   possible   contamination.      Thru-flight check    is    only    required    if    aircraft    has    been refueled. 8-4